Cooling arrangement for exhaust valves of internal-combustion engines



y G. CATTANEO, COOLING ARRANGEIIIENT FOR EXHAUST VALVES OF INTERNAL COMBUSTION ENGINES APPLICATION FILED APILZ?, i918.

l Patented May 9, 1929.

INVENTOR UNITED. STATES ATENT OFFICE.

GIUsTmo' CATTANEO, oF MILAN, ITALY.

INTERNAL-COMBUSTION 1 941 5, Application nled Aprll 27,

Specification of Letters Patent.

Patented Mayr 9, 1922. 191s. serial 110.231,233.

(GRANTED Uimna Tur. raovrs'rons or THE AcT or MAacH'a, 1921,41 sTAT. L., 131s.)

Toallwkomtmayconce'm;

Be it known that I, GIUSTINO CATTANEO, employee subjectV of the King of Italy, resident of 79 Via Monte Rosa, have invented new and useful Improvements in `the Cooling Arrangements for Exhaust Valves of-InternaL' Combustion Engines, (for which I have filed an a plication 1n Italy April 18, 1917,) of' whic the following is a specification. This invention relates to valves, and in particular to exhaust valves for internal combustion engines. An object of the invention is to rovide an improved valve (ling a cooling device whereby suitable cooling liquid may -be circulate through the valve body and) stem without interfering with the proper operation of the valve. A further object of the invention is to provide means `for lintroducing the cooling medium' into the valve through the controlling .mechanism therefor,. 1n' order' to avoid sliding joints 'between the liquid eeding means and the movable valve structure.

' The arrangement according this invention alor-ds a perfect oil"circulation inside the valve and permits of the diiiicultiesI concerni'ng the t1 htness of the joints being eliminated in t e simplest way -without hindering the motion of the valve itself.

The arrangement will be-readily iunderstood reference being made to the 'annexed drawing ried by The exhaust valve -V-f-,af-controlling the of thefburnt gases from the `exploishollow inside andcommunicates with the ortl -'-k-. The lever '--c--rests on the ollow valve head '-e', and its interior communicates with the interior of head. -ethrough an` opening which is preferably in alignment withthe axis of the valve;

guide s and serves also. as an interme-4 diary through wliich the valve disc-1s carthe s rinl disc eL- A pipe fwinside o the ollow valve stem forms anV extension of e-v and reaches down close to .the valvey body, which is also holilan, inthe Kingdom of Italy, No.

tween the valve controllin valvey can be constructed 1n any suitable between the upper portion or .pipe fur- 'and the p1 e shaped extension of disc -d,

reservoin whereupon it is again circulated through the valve after having been cooled,

if desired, by traversing a radiator of any v suitable construction.

B this arrangement the oil is circulated insi e the stem and discs of the exhaust valve, all parts ofwhich are thus conveniently cooled. v

Further thel more or less perfect tightness of the various parts in which the oil is circulated does not aiect the regular working` of the engine, there existing no communication whatever between the circulating'pressure voil .and the exhaust gas chamber. Y

The intermediary lever -c can be built as a vrocking lever or as a cylindrical rod to which fa rectilinear motion isim arted, that is' to say the intermediary memher bemanner. Of course also in other parts of the device the constructional details and those camv and the concerning the form may be, varied from those described and illustrated without dearting-.from the spirit and scope of the 1nvent1on` as set forth in the appended claims. l l' Having now described my invention and how the same is to be .carried out, what I claim as my invention, is:

1. In an internal combustion engine, tho

combination with a valve havlng a nollow body and stem, and a hollow valve head mounted in said stem, of a hollow actuat- 'ing member engaging said valve head, the

having a recessedend closely litt-ing said valve head, the engaging surfaces of said lever and valve head having apertures affording a permanent communication between the interior of said lever and the interior of said valve head.

3. In an internal combustion engine, the combination with a valve having a hollow body and stem`, and a hollow valve head engaging said stem, of a hollow actuating rock-lever extending at an angle to said valve stem, a hollow pivot for said lever adapted' to be connected to a supply 'of liquid,

said pivot having an aperture communicating wlth the interior of said lever, said leverengagng said valve headfand having Aan opening communicating with the' interior of said valve head.

'4. In an internal combustion engine, the combination with a valve having la hollow body and stem, and a hollow valve head mounted in said stem, of a hollow cam-actuated lever extending at an angle to said valve stem, a hollow stationary pivot for said lever adapted to be connected to a supply of liquid, said pivot having an aperture communicating with the interior of said lever, 'said lever having a recessed end closely fitting said valve head, the engaging surfaces of said lever and valve head having apertures connecting the interior of said lever with the interior ofsaid valve head, and an outlet for the liquid in. said valve, arranged between said valve head and stem.

In testimony whereof I- aHX my signature.

GIUSTINO CATTANEO. 

